Scientists discovered that a little-known group of ancient people, the Denisovans, may predate the Neanderthals at a site important to the story of humankind.
K. Yap, V. Srinivasan, and M. Motani. SenSys '05: Proceedings of the 3rd international conference on Embedded networked sensor systems, page 166--179. New York, NY, USA, ACM Press, (2005)